[Does the Kyungrak explain ulcers of the stomach and duodenum?].
D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049673:History, 20th Century; D008518:Medicine, East Asian Traditional; D010437:Peptic Ulcer / Q000266:history*
Explica o Kyungrak as úlceras do estômago e do duodeno?